ALL%DROP

                INTEGER ALL%DROP[2]

      This is an integer array giving the number of edge channels  ignored  when
    reading  a UV table. Edge channels may have different weights than the other
    ones, especially for ALMA data because of the off-line Doppler correction.

    Such low weights edge channels are automatically dropped for Single  fields,
    so  you can use ALL%DROP = 0, but not yet for Mosaics, where ALL%DROP = 5 is
    more appropriate.

    Larger values may be useful for SURVEY mode.